7421109840 has 200 divisors, whose sum is σ = 26606773248. Its totient is φ = 1915073280.

The previous prime is 7421109833. The next prime is 7421109859. The reversal of 7421109840 is 489011247.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7421109795 and 7421109804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 182409 + ... + 219351.

Almost surely, 2^7421109840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7421109840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13303386624).

7421109840 is an abundant number, since it is smaller than the sum of its proper divisors (19185663408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7421109840 is a wasteful number, since it uses less digits than its factorization.

7421109840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36999 (or 36984 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 7421109840 is about 86145.8637428403. The cubic root of 7421109840 is about 1950.5464030929.

The spelling of 7421109840 in words is "seven billion, four hundred twenty-one million, one hundred nine thousand, eight hundred forty".